public class Main {
    public static void main(String[] args) {
        System.out.println("Hello World!");
        System.out.println("-----------");
        int a = 1;
        long l = 10L;
        double d = 1.0;
        float f = 1.3f;
        char ch = '你';
        byte b = 127;
        short sh = 10;
        boolean flg = true;
        String str = "hello";
        System.out.println(a);
        System.out.println(l);
        System.out.println(d);
        System.out.println(f);
        System.out.println(ch);
        System.out.println(b);
        System.out.println(sh);
        System.out.println(flg);
        System.out.println(str);
        System.out.println("-----------");
        a=(int)l;
        l=a;
        System.out.println(a);
        System.out.println("-----------");
        byte b1=10;
        byte b2=20;
        byte b3=(byte)(b1+b2);
        System.out.println(b3);
    }
}
